For a particular printing ink and drop-on-demand piezoelectric inkjet printhead, piezoelectric voltage and temperature of the ink were varied to change the inkjet performance, and the jetting velocity of the inkjet was analyzed under various conditions. The ink was cooled by using a Peltier module, which was attached to the nozzle plate as a heat sink. The inkjet drops were captured by the shadowgraphic method using a high-speed camera. The positions and velocities of these drops were then estimated after image processing. The drop state was distinguished by dimensionless numbers, such as the Weber and Z numbers, to decide whether it was stable for ejection and printing. Increasing the piezoelectric voltage increased the ejection velocity but with an associated generation of satellite drops. Cooling the ink increased the viscosity, which in turn decreased the drop velocity while diminishing the satellite drops. Therefore, it was shown that the cooled ink enabled stabilized inkjet ejection.

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按需滴压电喷墨性能分析

对于特定的印刷油墨和按需滴落压电喷墨打印头，改变压电电压和油墨温度以改变喷墨性能，并在各种条件下分析喷墨的喷射速度。通过使用Peltier模块冷却墨水，该模块安装在喷嘴板上作为散热器。使用高速照相机通过阴影照相法捕获喷墨液滴。然后在图像处理后估计这些液滴的位置和速度。墨滴状态通过无量纲数字（例如Weber和Z编号）进行区分，以决定它对于喷射和打印是否稳定。压电电压的增加增加了喷射速度，但伴随着卫星滴的产生。冷却墨水会增加粘度，依次降低了下降速度，同时减少了卫星下降。因此，表明冷却的墨水能够稳定地进行喷墨。